Vat dyestuff and method for its production



Patented 2 9, 1933- 1 p p gjgipun v V 1 VAT, DYESTUFF AND METHOD Foxfire I HIPRJODUQTION 1 Max AlbertKuiia Mannheim, and Karl Koebe'rle- If and Erichj Berthold', Ludw'ig'shafen-on-the- Rhine, Germany, assignorsto General Aniline Works, Inc.,'New York,,N. Y., a corporation of Delaware No Drawingl AmilicationMarelill l, 1929 n l v The present invention relates to' newfvat dye-5 ing a monoor dihalogen-3.4. 8.9 dibenzopyrene;

v 5.10-quinone with an L-amino'anthi'aquinOne containing in'theZ-pOsitiOn a substituent capable of being converted into analdehydegroup;and-com verting said substituent into the aldehyde group; 'A substituent of the said kind is for example the methyl group which canybe converted.- into the aldehyde groupvery readily by oxidation. Such oxidation may even'occur, and is preferably effected, during the condensation with the: halogen-- dibenzopyrene-quinone, for eiz'a mple when work- 7 ing under oxidizing 'conditi'ons such asworking in nitrobenzene" in the presence" of copper oxide and introducing oxygen 'orr gasesicontaifiing oxy-- gen; Another exam le "of suchvsubs'tituents is the azomethine group CH=N-;B,, or. the 'dihalogen-methyl grofupa H Halz'," w hich groups can be split up to thej ldhydefgroupby treatment withaci s such asfsulphuriclac'id "f The' V dyestufis obtainable according torthe'pre'sent inyention correspondltothe'general 0mm;

wherein n is 1 or 2. 1' V The same. dyestuffs arealso obtained by eondensingl molecular proportion of a monoor dihalogen -3.4.8.9 dibenzopyrene 5.10- quinonewith from 1 to 2 molecularproportionsof 1-.

amino-2-anthraquinone-aldehyde, but we. do not claim this method as part of our invention.-

quinone, give brown dyeings of excellent fastness from violet vats. They dissolve to red solutions qacid.f p. p a The following examples willfurther illustrate with a bluish tinge in fcohcentrated sulphuric the nature of our present invention'which, how

ei h -l" ever, is notI Iim' 'ed thereto; v- The parts". are by 5.10-quinone are boiled in '800 parts of nitrobenz ene,; while stirring, with 25 partsof 1 a1nino-2- 'anth aquihoneaaldehyde, 2 5 parts; of: sodiuinlacev 41 parts of'mono brorno-3. 4.8.Q di1oenaopyrenetatejand {p rt or co per: oijtid'e, until the;,r

action product is free irombromi'ne; T e product' may be worked up by filtering by 'suction ahd treating theiresidue with steam in order "to lre ably corresponding to the" formula: 1

or of steam or both. The resulting dyestuff'prob;

wn powder dissolving to a bluishred somshades.-

' Instead of nitrobenzene; other xsolvents or'suspension media,

5.-10- q'uinone are boiledin 400 parts ofinitrotolf tion concentrated sulphuric acid"and dyeing i the "v able fi rft e .ayi l atl yf s b aw i uene, While stirring and; passing" through a"curt rent of" oxygen, with '30 parts of 1-amino-2- I :methyanthraquinona'SO parts'of calcined potassium carbonate and 10 parts of copper oxide,

until the reaction product is practically'free from bromine. :The product is worked up as indicated in Example l. "'It may he purified by treatment withsodium hypochlorite' and is identical with the product described in Example 1.

Example 3 49partslof dibromo-3L4 .$:.9-dibenzopyrene-5.lqquinone are boiledin 1500 parts ofnitrobenzene, while stirring' and -introducing a current of air-Ti v or oxygen, with 150 parts of potassiumcarbonate, 120 parts of copper oxide and 55 parts of l-amino- 2-methylanthraquinone, until the reaction prodnot is practically free v from bromine. The prod uctprobably corresponding to. the formula;

I y In an analogous manner the dyestuif described",

in Example 1 can be obtained from monobromo 3.4.8.9-dibenzopyrene-5.l0 quinone and the above,

azomethine. I l 3, .7

Whatwe claim is;,- l

is worked up in'the usual manner" andim'ayi be purified for example by treatment, in paste form,

V phuric'i acid and dyes cotton from a violet blue 'vat'red-br'ownshades of excellent fastness, T V vv e The same dyestufi can be prepared by .condensationofjl; molecular proportion ofwthe above v dibromo-dibenzopyrene-quinone with 2molecular 1 proportions of l-amino-2-anthraquinone-aldehyde; x v 1 I Ezcamplel '1 Y:

pyrene=5.10'- quinone are boiled in 1200' parts of nitrobenzene, while; stirring; with 'partsof sohas dium acetate, 51 parts of copper oxide and parts of 1 the 'azomethine' which is theconder' 1 sation'f product of l -amino 2-anthraquinone-aldehyde and aniline (corresponding to the formula and obtainable lay-oxidizing li-amino-2-methylane thraquinone ,in the presence of aniline), until the reaction product is "practically "fr'eefrom bro .170 i i Q dyeing cottonlfrom a viol which-comprises heatinga1-amino 2-methylan-, e

3 thraquinon'e andamonobromoeii.4.8.9-dibenzo 'ence'of a gasJcomprisingoxygen. 120

'renequ inone in nitrobenzene in the presence of 1 reaction mixture.

the formula I I a H "t cvatbrownshades of excellent fastness'and dissolvin to a red solution acid, -1 .7 V

2. c'l he'fproc'es's or producing vat "dyestuifs,

pyrenequinone in-an organic solvent in the pres- ,3.,The process of producingwat dyestufis, which comprises heating l-amino-Z-methylanthraquinone and monobromo-B.4.8.9 dibenzopy-- copper oxidejwhile passing oxygen'thr'ough the ALBERT KUNZ.

KARL KOEBERLE," ER-lICI-I BERTH'OLD,

1. The vat" dyestuffsprobably corresponding to a with 'a bluishi tinge in ;concentrated sulphuric 

